Possible ethnic associations in primary hyperoxaluria type-III-associated HOGA1 sequence variants

Area of Science:

• Genetics
• Metabolic Disorders
• Molecular Biology

Background:

• Primary hyperoxaluria type III (PHIII) is a genetic disorder affecting glyoxylate metabolism.
• It is caused by pathogenic variants in the HOGA1 gene.
• Over 50 disease-associated variants have been identified in the HOGA1 gene.

Purpose of the Study:

• To investigate the ethnic associations and population-specific distribution of HOGA1 gene variants in Primary hyperoxaluria type III.
• To identify potential founder effects for specific HOGA1 alleles in different ethnic groups.

Main Methods:

• Literature review and analysis of reported HOGA1 gene variants.
• Examination of allele frequencies in various ethnic populations (Caucasian, European, Ashkenazi Jewish, Chinese).

Main Results:

• The HOGA1 gene exhibits population-specific variants, with some showing evidence of founder effects.
• Variant c.700+5G>T is prevalent in Caucasian and European populations.
• Two variants (c.860G>T and c.944_946delAGG) account for 95% of alleles in Ashkenazi Jewish patients.
• A mutational hotspot at c.834 is frequently observed in Chinese patients.

Conclusions:

• HOGA1 allele distribution in Primary hyperoxaluria type III demonstrates significant ethnic associations.
• These associations range from recurrent mutations within ethnic groups to potential founder effects.
• Understanding these ethnic patterns is crucial for genetic counseling and disease management.